Update CHANGELOG.md (#641)

CHANGELOG.md

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 # Change log
+## 6.3.1
+
+### New Features
+* Added Seafile provider connection options
+* Interface Themes support
+* 150% interface scaling support (Windows, Linux)
+* Spellchecker implemented as SharedWorker. No more back-end service for spellchecker
+* Ability to add file to favorites (must be supported on DMS side)
+* Password protection support
+* New chart types (lines and scatter)
+* Check hyperlinks for 2083 symbol length
+
+### Document Editor
+* Wrapping for shapes in Top Toolbar
+* Indents settings in Paragraph Right Sidebar
+* Change Register operation in Top Toolbar
+* Change List Level operation
+* Export to html, fb2, ePub
+
+### Spreadsheet Editor
+* Add new chart type - combo
+* Redone Chart Advanced Setting with more axis settings
+* Add ability to set axis label format
+* New date format "YYYY-MM-DD" (ISO 8601)
+* Cell Indent setting in Table Right Sidebar
+* Opening of Microsoft Office XML 2003 files
+* Group and Ungroup operation for Pivot Tables
+* XLOOKUP function
+
+### Presentation Editor
+* Slide opacity setting
+* Setup columns in shape via Top Toolbar
+* Presentation Animations are saved after export from our editor
+
+### Fixes
+* All editors received countless fixes
+ 
+## 6.2.0
+
+### New Features
+
+#### All Editors
+
+* Ability to use Tab/Shift+Tab in some dialog windows
+* Change color of loader to darker one
+* Ability to setup font size 300pt (409pt for Spreadsheets)
+* Implemented a new Document Server integration scheme
+* Ability to protect documents, spreadsheets and presentations using a digital signature
+
+#### Document Editor
+
+* Ability to insert Table of Figures
+
+#### Spreadsheet Editor
+
+* Ability to insert slicers in pivot tables
+* Data Validation settings
+* Ability to cancel auto-expansion of tables
+* Support of custom number format
+* GROWTH, TREND, LOGEST, UNIQUE, RANDARRAY functions support
+
+#### Presentation Editor
+
+* Ability to setup auto-format as you type
+* Buttons for increase-decrease font size
+
+### Fixes
+
+* All editors received countless fixes
+
+
+## 6.1.0
+
+### New Features
+
+#### All Editors
+
+* Complete redone html-based formats (`ePub`, `mht`, `html`)
+* `fb2` format can be opened in viewer
+* Redone gradient control and ability to set custom angle for gradient fill
+* New icons in context menu
+* Add support of AutoFormat as you type
+* Apply button in File menu always visible
+* Ability to copy comment from left sidebar
+* Translate plugin uses Google Translate, instead of Yandex
+
+#### Document Editor
+
+* Ability to show line numbering
+* Ability to add cross-reference
+* Add support of endnotes
+* Ability to edit AutoCorrect list
+* Select Data button in Chart Editor
+
+#### Spreadsheet Editor
+
+* Ability to work with sheet view (available only for paid version)
+* Support of editing data ranges in Chart
+* Redone cell editor height change
+* New cursor for column\row hover
+* Ability to hide freeze pane shadow
+* Pivot Table can be inserted from `Insert` tab
+
+### Fixes
+
+* All components received countless fixes
+
+## 6.0.2
+
+### Fixes
+
+#### All Editors
+
+* Fix problem with insert BMP image in doc (Bug #47276)
 
 ## 6.0.1